[Search:SearchApplications:Docs Explorer page]Issues with Sort by field

[L1nBra]

Description
Combo box options should be announced correctly without unexpected options, additional words. Also correct total number should be announced. For the user using assistive technology to clearly understand what options are in the list and how many of them are in total.

Preconditions
Stateful Search Applications -> Docs Explorer page is opened.
Search application is added.
Use Screen Reader (NVDA).

Steps to reproduce

1.Using only keyboard Navigate to Sort by field by pressing Tab key.
2.Navigate through options by pressing down arrow key.
3.Observe screen reader.

NVDA Speech Viewer + UI elements

Actual Result

• (1)Additional options are announced without total number (example:"DestRegion" announced after "DestCityName 7 of 9"). (2)Different total number is announced for options (example: "7 of 9", "8 of 10"). (3)With some options additional text is announced (example when user navigates to DestRegion option: "AvgTicketPrice Cancelled Carrier Dest DestAirportID...").

Expected Result

• Additional options without total number are not announced. Same total number should be announced (there are ~over 40 options) with options. Additional, unexpected text is not announced together with option, only the option "DestRegion 9 of 11".

Meta Issue

Kibana Version: 8.17.0-SNAPSHOT

OS: Windows 11 Pro

Browser: Chrome Version 130.0.6723.70 (Official Build) (64-bit)

Screen reader: NVDA

WCAG or Vendor Guidance (optional)

• Understanding SC 1.3.1: Info and Relationships (Level A)(https://www.w3.org/WAI/WCAG22/Understanding/info-and-relationships.html)
• Understanding SC 4.1.2: Name, Role, Value (Level A)(https://www.w3.org/WAI/WCAG22/Understanding/name-role-value.html)

Related to: https://github.com/elastic/search-team/issues/8256

[elasticmachine]

Pinging @elastic/kibana-accessibility (Project:Accessibility)

[alexwizp]

@L1nBra could you please check the same behaviour https://eui.elastic.co/#/forms/combo-box#virtualized here. I suspect it should be discussed wtih EUI Team.